2) a much more intense version of "what?!"
person1: dude, he totally just trashed that white otter-tape
person2: what a HWOTT
person1: the sex pistols suck!!
person1: i just killed a guy.
person2: HOLY WHITE OTTER-TAPE TRASHER!!!!
What a holy white otter tape trasher!
HWOTT!? Thats INSANE!
HWOTT!? That was shocking!